R. K. Agrawal

Work place: School of Computer and Systems Sciences, Jawaharlal Nehru University New Delhi, India

E-mail: rka@mail.jnu.ac.in

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Biography

Ramesh Kumar Agrawal received M. Tech. degree in computer application from Indian Institute of Technology, Delhi. He has done his Ph.D. in computational physics from Delhi University. Presently, he is working as a professor in School of Computer and Systems Sciences, Jawaharlal Nehru University, New Delhi. His current areas of research are classification, feature extraction and selection for pattern recognition problems in domains of image processing, security and bioinformatics.

Author Articles
Microarray Gene-expression Data Classification using Less Gene Expressions by Combining Feature Selection Methods and Classifiers

By Aarti Bhalla R. K. Agrawal

DOI: https://doi.org/10.5815/ijieeb.2013.05.06, Pub. Date: 8 Nov. 2013

Microarray Data, often characterised by high-dimensions and small samples, is used for cancer classification problems that classify the given (tissue) samples as deceased or healthy on the basis of analysis of gene expression profile. The goal of feature selection is to search the most relevant features from thousands of related features of a particular problem domain. The focus of this study is a method that relaxes the maximum accuracy criterion for feature selection and selects the combination of feature selection method and classifier that using small subset of features obtains accuracy not statistically indicatively different than the maximum accuracy. By selecting the classifier employing small number of features along with a good accuracy, the risk of over fitting (bias) is reduced. This has been corroborated empirically using some common attribute selection methods (ReliefF, SVM-RFE, FCBF, and Gain Ratio) and classifiers (3 Nearest Neighbour, Naive Bayes and SVM) applied to 6 different microarray cancer data sets. We use hypothesis testing to compare several configurations and select particular configurations that perform well with small genes on these data sets.

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